What I got from the talk Ali and Jillian had was that Ali hides behind the fat because it gives her an excuse just in case someone "leaves" or abandones her... as she feels her parents did when she was young. Ali was using "being fat" as a rational for why people would leave her... it wasn't because they didn't like HER... it was because she was fat...
Jillian wanted her to figure out why she eats the way she does and why she maintains the heavy body so she won't go back home feeling exposed and vulnerable and put all the weight back on.
At least that's what I got out of the exchange.

